Closure latch

ABSTRACT

A closure latch for a vehicle deck lid or the like includes a striker secured to the deck lid in cooperative relation to a latch pivotally connected to the vehicle body for movement from a first or unlatched position out from engagement with the striker to a second or latched position engaging the striker to pull it, thereby pulling the deck lid firmly against the vehicle body with a weather seal compressed between the deck lid and the vehicle body. A latch hook is pivotally connected adjacent to the latch and is normally biased to engage the latch and retain it in the first position but is adapted to be contacted by the striker for disengagement from the latch to permit movement of the latch by a differential fluid pressure operated piston or by rotation of the latch hook as effected by contact with the striker.

United States Patent [72] Inventor Theodore F. Peters Utica, Mich. 121]Appl. No. 846,539 [22] Filed July 31, 1969 [45] Patented Aug. 3, 1971[73] Assignee General Motors Corporation Detroit, Mich.

541 CLOSURE LATCH 6 Claims, 3 Drawing Figs.

[52] 1.1.8 Cl 70/240, 70/275, 292/198. 292/201, 292/240, 292/304, I292/336, 292/D1G. 43 [51] Int. Cl 1305b 51/0 2,

1505b 65/19 [50] Field otSearch 70/142, 157, 240, 275; 292/201, 198,240, 304, 336, 341.13, 341.16, 341.17, 229, 333, 334, 341.11

[56] Reterences Cited UNITED STATES PATENTS 1,943,927 1/1934 Phillips292/341.11 X

Primary Examiner-Albert G. Craig, Jr. Att0rneys-Warren E. Finken andArthur N. Krein ABSTRACT: A closure latch for a vehicle deck lid or thelike includes a striker secured to the deck lid in cooperative relationto a latch pivotally connected to the vehicle body for movement from afirst or unlatched position out from engagement with the striker to asecond or latched position engaging the striker to pull it, therebypulling the deck lid firmly against the vehicle body with a weather sealcompressed between the deck lid and the vehicle body. A latch hook ispivotally connected adjacent to the latch and is normally biased toengage the latch and retain it in the first position but is adapted tobe contacted by the striker for disengagement from the latch to permitmovement of the latch by a differential fluid pressure operated pistonor by rotation of the latch hook as effected by contact with thestriker.

PATENTED Am; 3 mm SHEET 1 [IF 2 CLOSURE LATCH This invention relates toclosure latches and more particularly to a closure latch which isadapted to be closed manually or by a power-actuated device and which isadapted to be latched either manually or by a power-actuated device andwhich is adapted to be unlatched either manually or by a power actuatedvalve control mechanism.

In various applications of closure latches, for example, in a motorvehicle deck lid, it is desirable that the final closure be powerassisted so as to draw the deck lid tightly shut assuring adequatecompression of a weather seal, but is also desirable under certaincircumstances to'be able toeffect this closure manually. It is alsodesirable in order to minimize alignment requirements to have theclosure latch operable in more than one latching hold down position.

Accordingly, the primary object of this invention is to improve aclosure latch mechanism for use on a vehicle decklid whereby the decklid is pulled to a fully closed position either by a power assistmechanism or manually. Another object of this invention is to improveclosure latch mechanisms so that the closure latch mechanism is operablein an infinite number of latching hold down positions. A still furtherobject of this invention is to improve closure latch mechanisms wherebyunlatching can be effected either manually or by a power actuatedcontrol element.

In accordance with the present invention, the closure latch mechanismincludes a striker member mounted on the deck lid of a vehicle which isadapted to be moved to a partially closed position at which position thestriker can be engaged by a latch which is pivoted to the bodyof thevehicle. The latch is pivotable from a spring-biased unlatched position,maintained by a biased hook having a detent engageable with a stop onthe latch, to a latched position either .by a fluid operated powermechanism or manually. For power operation, the latch is connected to avalve-controlled differential fluid pressure operated motor. Manualpivotal movement of the latch is done by mans of the hook engaging alatching pin on the latch as the deck lid is forced down by an.operator. Unlatching is effected by either power or manual actuation ofthe valve system controlling the operation of the differential fluidpressure operated motor. I

For a better understanding for the invention as well as other objectsand further features thereof, reference is had to the following detaileddescription of the invention to be read in connection with theaccompanying drawings, wherein:

FIG. 1 is a partial elevational view of the rear of a motor vehicle bodyembodying a closure latch according to this invention;

FIG. 2 is an enlarged view ofa portion of FIG. 1 with parts broken awayfor the sake of clarity showing the closure latch of the invention in aclosed position; and,

FIG. 3 is a view taken along line 3-3 of FIG. 2.

Referring now particularly to FIG. 1 of the drawings, a vehicle bodyincludes a rear window 12 and a deck lid 14 which is swingably mountedat its forward edge, not shown, on the body 10 for movement between aclosed position, as shown,

and an open position, not shown, to open and close the rear deckcompartment of the vehicle. Preferably, the deck lid is swingablymounted by spaced counterbalanced hinges, as is well known in the art.

Referring now to FIGS. 2 and 3, the deck lid 14 includes an outer panel20 and an inner panel 21 suitably secured to each other to provide ahousing 22 at the rear portion of the deck lid. Positioned within thehousing 22 and suitably secured to the inner panel is a backplate 23 forsupporting the striker assembly 30 of the closure latch, while anotherback plate 24 is secured in a suitable manner to the vehicle body 10 forsupporting the latch assembly 40 of this closure latch.

The striker assembly 30 which could be made as a single unitarystructure, is preferably constructed .as shown, to include a strikerbase 32 having flanged portions 32 secured as by bolts 34 to inner panel21 and backplate 23 and having a depending striker portion 33 to which astriker roller 35 is rotatably secured as by headed stud 36. Thedepending striker portion 33 carrying the striker roller 35 extendsthrough suitable apertures 25 and 26 in the backup plate 23 and innerpanel 21, respectively, to pass through the aperture 11 in the vehiclebody 10 as the deck lid is lowered so that the striker roller 35 is inoperative relation to the latch assembly 40.

The latch assembly 40 includes a baseplate 41 secured by stud bolts 42to backplate 24. The baseplate includes a central mounting portion 43with raised boss-bearing portions 44 and includes a depending supportportion 45 terminating in an apertured cylinder support portion 46.

A latch is pivotally mounted intermediate its ends by a pivot stud 47 toa centrally located boss-bearing portion 44 of the baseplate 41. Thelatch 50 is provided with an eccentric pull down flange portion 51adapted to cooperate with striker roller 35 and a stop flange 52 spacedfrom the pull down flange 51, all positioned at one end of the latch. Asshown, the leading edge portion of the pull down flange, that is, theportion which first engages the striker roller, is spaced a greaterdistance from the axis about which latch 50 is pivoted than the trailingedge portion so that as the pull down flange engages the striker roller,it is pulled toward the pivotal axis, the term pull down being usedrelative to the arrangement shown. At its opposite end, the latch ispivotally secured by pin 53 to one end of link 54, the opposite end ofthis link being pivotally connected by pin 55 to piston rod 75 of adifferential fluid pressure operated motor 70 whereby the latch can berotated in a counterclockwise direction, as seen in FIG. 3, form anunlatched position as shown by the broken lines in this figure to alatched position, as shown.

The latch 50 is normally biased clockwise to the unlatched position, theposition of the latch as shown by the broken lines in FIG. 3, by spring56 and is normally held in this position by hook 60. Spring 56 has oneleg engaging a suitable apertured portion of baseplate 41 and has itsother leg engaging a pin 56 secured to the latch 50.

A latch hook 60 is pivotally secured at one end to a lower boss-bearingportion 44 of baseplate 41 by headed pivot stud 61 and is normallybiased in a clockwise direction as seen in FIG. 3, by spring 62 havingone end engaging an apertured portion of baseplate 41 and its other endextending through a suitable aperture in hook 60. The free end of thelatch hook is provided with a curved follower portion 63 adapted to been gaged by striker roller 36 to effect rotation of the latch hook in acounterclockwise direction against the biasing action of spring 62.Intermediate its ends, the latch hook is provided with a detent 64adapted to engage stop flange 52 of latch 50 to normally retain thelatch in the unlatched position shown by the broken lines in FIG. 3.

On the opposite side from the curved follower portion 63, latch hook 60is provided with a latch-operating portion 65 adapted to engage alatching pin 58 secured to latch 50 for a purpose to be described.

Latch 50 can be rotated in a counterclockwise direction, from anunlatched position to the latched position, as previously described inrelation to FIG. 3,. either by a differential fluid pressure operatedmotor or manually by means of latch hook 60 contacting the latching pin58 on latch 50.

In the preferred embodiment, the differential fluid pressure operatedmotor 70 includes a cylinder 71 enclosed at one end by apertured coverplate 72 secured thereto as by welding and by means of which thisassembly is secured by bolts 73 to the apertured cylinder supportportion 46 of base plate 41 and is suitably enclosed at its opposite endas, for example, by a valve assembly 74 which may be a separate elementsecured to the cylinder, or as shown, formed as an integral partthereof. A piston rod 75 connected at one end by link 56 to the latch 50extends through the apertured cylinder support 46 and apertured coverplate 72 and is provided at the opposite end with a piston in the formof opposed piston cups 76 and 77 secured between the shoulder 78 on thepiston rod and nut 79 engaging the threaded end of this rod. The size ofthe apertures in the cylinder support portion 46 and cover plate 72 arelarge enough to provide sufficient clearance around the piston rod topermit the easy ingress and egress of aeriform fluid.

The piston is moved to the right, as shown in FIG. 3, by connecting thisendof the cylinder to a vacuum source by means of the valve assembly 74which is provided with a chamber 81 connected to passage 82 incommunication with a spring 83 biased ball check valve 84 connected byconduit 85 to the vehicle engine intake manifold or to a vacuum storagetank, not shown, as is well known in the art. Thus, under normalcircumstances, either when the vacuum storage tank has been evacuated orwhen the engine is in operation the right-hand end of the cylinder 71will be evacuated, and then atmospheric pressure acting on the oppositeside of the piston will force it to the right overcoming the baisingaction of spring 56, unless, of course, the latch 50 is being retainedin the unlatched position by latch hook 60 as previously described. Topermit movement of the piston to the left as seen in FIG. 3 by thebiasing action of spring 56, pressure is equalized on opposite sides ofthe piston by having the right-hand end of the cylinder 71 placed incommunication with atmospheric pressure via solenoid valve SOL-V. Thearmature 86 of the solenoid valve SOL-V terminates in a valve stem 87having at its lower end valve element 88. which normally is biased byspring 90 against the valve seta formed on a wall portion of chamber 81,spring 90 having one end resting upon a shoulder 91 of the armature 86and the other end resting against a shoulder formed in valve chamber 92.The solenoid valve SOL-V is connectable to a suitable source ofelectrical power such as a vehicle battery 8-1 by means of normally openswitch SW-l which could be, for example, the ignition switch for thevehicle, and normally open switch SW-3 or by the parallel circuitcontaining normally open switch SW-2. Switch SW-2, for example, can besuitably mounted for access from the exterior of the vehicle either atthe rear of the vehicle or on the curb side of the vehicle, while switchSW-3 can be mounted on the instrument panel of the vehicle for operationfrom the interior of the vehicle. Upon closure of either switches SW-land SW-3 or switch SW-Z, the solenoid valve SOL-V is energized causingretraction of the armature 86 depressing valve element 88 thereby, ineffect, connecting chamber 81 via valve chamber 92 to the atmosphere.

In addition to venting of the cylinder 71 to atmospheric pressure byenergizing the solenoid valve SOL-V as previously described, provisionis also made whereby this can be done mechanically by means of rotatablecam 94 suitably journaled adjacent to the free end of the armature 86.The cam 92 is provided with a square-shaped bore which receives thecomplementary-shaped end of shaft 95. Shaft 96 is part of a key cylinderlock assembly 96 mounted to the vehicle body. The key cylinder lockassembly 96 is of a known type and upon insertion of a key therein, theshaft 96 can be turned to in turn rotate cam 94.

In the embodiment shown, the key cylinder assembly 96 is located on thevehicle body in position to mechanically actuate the solenoid valveSOL-V via shaft 95 and cam 94 but it is apparent that, if desired, thecylinder 71 could be connected by a suitable conduit to a separate butsimilar mechanically actuated valve located at any convenient locationon the vehicle body whereby the cylinder 71 can be placed in communication with aeriform fluid at atmospheric pressure.

When the valve element 88 is depressed connecting valved end of thecylinder to atmospheric pressure and closing off passage 82, thepressure on opposite sides of the piston is substantially equalizedenabling the spring 56 to effect rotation of latch 50 clockwise as seenin FIG. 3 to bring the latch to the unlatched position and to move thepiston to its normal position, to the left as seen by the broken lines.Thus, spring 56 acts as a piston return spring in much the same manneras if it were placed within the cylinder 71, as is well known in theart.

Referring again to FIGS. 2 and 3 of the drawings, the operation of theclosure latch will be described with particular reference being made tothe relationship of the various elements with respect to each other. Itis assumed that the deck lid is in a fully open position, that a vacuumis being maintained in the vacuum storage tank and that the solenoidvalve SOL-V is in the normally closed position with switches SW-2 andSW-3 in their normally open position and that the key cylinder assembly96 is in a locked position. At this time as a result of the previousunlatching of the closure latch, the latch 50 is in the unlatchedposition as shown by the broken lines in FIG. 3 and is retained in thisposition by biased latch hook 60 having the detent 64 thereon engagingthe stop flange 52 of latch 50. With the latch 50 thus restrainedagainst rotational movement in a counterclockwise direction, thedifferential fluid pressure operated motor 70, although connectable viathe ball check valve 84 to a vacuum source, cannot cause pivotalmovement of latch 50.

As the deck lid is lowered by an operator to a partially closedposition, the striker roller 35 engages the curved follower portion 63of latch hook 60 so that as the deck lid is moved further toward thefully closed position, striker roller 35 will move down beneath theleading edge of the pull down flange 51 while at the same time forciblyrotating latch hook 60 in a counterclockwise direction to disengagedetent 64 from stop flange 52, thereby releasing the latch 50. As soonas the latch 50 is released by latch hook 60, the piston of the differential fluid pressure operated motor 70 will be forced to the rightas seen in FIG. 3, thus, via the piston rod 75 and link 54, rotating thelatch 50 in a counterclockwise direction whereby the striker roller 35is engaged by the pull down flange 51 pulling the deck lid down to afully closed position while compressing a conventional sealing gasket 16between the deck lid 14 and the vehicle body 10. Striker roller 35 canride down under pull down flange 51 until it engages the stop flange 52which defines the lower pull down limit of the closure latch assembly.

However, depending on the compressibility of the sealing gasket or thealignment of the striker assembly on the deck lid and the latch assemblyon the vehicle body, the latch may be effectively rotated part of theway so that the striker roller 35 may come to rest at any position underthe pull down flange intermediate its ends with the deck lid tightlysecured and latched in position. Regardless of where the striker roller35 comes to rest under the pull down flange 51, the construction of theclosure latch of the invention still permits unlatching when desired.The differential fluid pressure operated motor 70 is, of course, of asize sufficient to overcome the force of spring 56 while at the sametime being able to effect the desired sealing of the deck lid bycompression of the sealing gasket 16 between the deck lid and thevehicle body.

As previously described, unlatching of the closure latch can beaccomplished either from the interior of the vehicle or from theexterior of the vehicle and it can be done either power assisted ormanually. For a power assisted opening, the operator can either closethe externally located switch SW-Z or from the interior of the vehiclehe can close switches SW-l and SW-3 to energize solenoid valve SOL-V,thereby causing armature 86 to retract thus depressing the valve element88 and placing the right-hand end of cylinder 71 in communication withaeriform fluid at atmospheric pressure allowing spring 56 to return thelatch 50 to the unlatched position and the piston to which it isattached to the left as seen in FIG. 3. As this occurs, the pull downflange 51 as pulled away from the striker roller 35 releasing it forupward movement thus allowing the deck lid to move upward under theinfluence of the conventional counterbalanced spring hinges. 'When thedeck lid is moved upward, the latch hook 60 is then free to rotate in aclockwise direction, as seen in FIG. 3, by the biasing action of spring62 until the detent 64 on this hook again engages the stop flange 52 toretain the latch 50in the unlatched position.

In a similar manner, opening of the closure latch can be accomplishedmanually by turning the key of the key cylinder lock assembly 96 torotate cam 94 to mechanically depress the armature 86 of solenoid valveSOL-V thereby connecting the right-hand end of cylinder 71 to aeriformfluid at atmospheric pressure.

ble because of lengthy storageof the vehicle, it is not necessarytoestablish a source of vacuum power before the deck lid can be closed;Instead, the deck lid can be physically latched by the operator manuallydepressing the lid to a fully closed position causing the striker roller35 to engage the curved follower portion 63 of latch hook 60 therebyrotating this hook in a counterclockwise direction, as seen in FIG.-3.As the latch hook rotates inthis direction, thejlatch operating portion65 contacts the latching pin 58 on latch. 50, now released for movementby disengagement of detent 64 from stop flange 52, to effect rotationalmovement of the latch 50 whereby the striker roller 3 5 is pulleddownunder pull down flange 51 to efi'ect' latching. During this manuallatching, as the piston is moved to the right, as seen in FIG. 3, anexcessive buildup-of fluid pressure on that side of the piston will beprevented by the discharge of fluid through the ball checkvalve. Fullpull down for a tightl y sealed deck lid then results automatically whenthe vehicle engine is startedagain and a vacuum is established in thevacuum storage tank. V

This invention thus provides a deck lid closure latch'which is eitherpower operated to move the deck lidto a fully closed position ormanually operated and then power assisted for a fully sealed closure.The closure latch is also operable from either the interior ofthevehicle or from the :exterior of the vehicle, either power assistedor manu'allyop'erated, to efiect the unlatching of the deck lid.Although the closure latch of this invention'has been shown anddescribed in conjunction 'with a vehicle deck lid, it is obvious that itcan also. be used in conjunction with other vehicle closures or closuresin other devices.

While the invention has been described with reference to the structuresdisclosed herein, it is not confined to the details cations or changesas may come within the purposes of the imi set forth, and thisapplication is intended to cover such modifiprovements or the scope ofthe following claims.- i

What I claim is: V

' l. A closure latch for latching a closure member to a sup-. portmember, the closure member being swingably mounted for movement betweenopen and closed positions relative to the support member, the closurelatch including striker means secured to one of saidmembers, latch meanswingably mounted on said other member for movement from an unlatchedposition to a latched posi- "tion relative to said striker means, saidlatch means ineluding a pull down flange operable to engage and movesaid striker means relative to said other member when said latch meansis rotated from said unlatchedposition to said latched position, latchhook means movably positioned to normally engage and hold said latchmeans in said unlatched position and to be engaged by said striker meansfor movement to release said latch means, actuating means operativelyconnected to said latch mans for rotating said latch means between saidunlatched position and said latched position, said actuating meansineluding v I a diflerential fluid pressure operated motor connected tosaid latch means, valve mean connecting said differential fluid pressureoperated motor to a source of fluid at a first pressure and to a sourceof fluid at a second pressure, and

valve actuator means operatively connected to said valve means toselectively control said valve means. 2. A closure latch according toclaim 1 wherein said valve means includes I first valve means connectingsaid differential fluid pressure operated motor to said source of fluidat a firstipressure, and i second valve'means connecting saiddifferential fluid pres sure operated motor to said source of fluid at asecond pressure, and i wherein said valve actuator means is operativelyconnected to said second valve means for selectively operating saidsecond valve means. 3. A closure latch for latching a closure member toa suption spaced a greater distance from said axis than said trailingedge portion, a stop means adjacent said trailing edge portionpositioned to be in interference relation to said striker means, and alatchingpin, said flange means being operable to engage andmove saidstriker means relative to said other member when said latch means isrotated from said unlatched position to said latched position, a v latchhook means swinga bly positioned adjacent said latch means to normallyengage said stop means to hold said latch means in said unlatchedposition and to be engaged by said striker means for movement to releasesaid latch means and to engage said latching pin to pivot said latchmeans from'said unlatched position toward said latched position,

power means operatively connected to said latch means for i rotatingsaid latch means from said unlatched positionto said latched position,and back to said unlatched position and.

controlmeans connnected to said power means to operate said power meansto selectively move said latch means between said unlatched position andsaid latched position and to permit movement of said latch means by saidlatch hook means. v

4. A closure latch according to claim 3 wherein said power meansincludes a differential fluid pressure operated motor connectable to asource of fluid at a first pressure and to a source of fluid at a secondpressure, said differential fluid pressure operated motor beingconnected to said latch means to move said latch means to said latchedposition, and

bias means connected to said latch means to normally bias said latchmean to said unlatched position.

5. A closure latch according to claim 4 wherein said control meansincludes a one-way valve means connecting said differential fluidpressure operated motor to said source of fluid at a first pressure,

valve means connecting said differential fluid pressure operated motorto said source of "fluid at a second pressure, and

key cylinder lock means operatively connected to said valve means toselectively actuate said valve means.

6. A closure latch according to claim 4 wherein said control meansincludes a one-way valve means connecting said differential fluidpressure operated motor to said source of fluid at a first pressure,

valve means connecting said. differential fluid pressure operated motorto said source to fluid at a second pressure, and

electrically operated means operatively connected to said valve means toselectively actuate said valve means.

my UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No.3,596,484 Dated November 5 1971 Inventor) Theodore F. Peters It iscertified that error appears in the above-identified patent and thatsaid Letters Patent are hereby corrected as shown below:

Column 1, line 12, after "but", insert --it--;

line 16, "hold" should read --hold-; line 39, "mans" should read--means--: and, line 74, "striker base 32" should read --striker base3l-; Column 2, line 30, "form" should read --from--;

line 46, "36" should read --35--; and, line 70, "56" should read --54--;Column 3, line 26, "seta" should read --seat-:

line 48, "92" should read --94-; and, line 50, "96" should read --95--;Column 6, line 10, "member" should read --members,--;

line 12, delete the word "be": line 14, "leasing" should read-leading--; and, line 49, "mean" should read --means--.

Signed and sealed this 21st day of March 1972.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. ROBERT GOTTSCHALK Attesting Officer Commissionerof Patents

1. A closure latch for latching a closure member to a support member,the closure member being swingably mounted for movement between open andclosed positions relative to the support member, the closure latchincluding striker means secured to one of said members, latch meanswingably mounted on said other member for movement from an unlatchedposition to a latched position relative to said striker means, saidlatch means including a pull down flange operable to engage and movesaid striker means relative to said other member when said latch meansis rotated from said unlatched position to said latched position, latchhook means movably positioned to normally engage and hold said latchmeans in said unlatched position and to be engaged by said striker meansfor movement to release said latch means, actuating means operativelyconnected to said latch mans for rotating said latch means between saidunlatched position and said latched position, said actuating meansincluding a differential fluid pressure operated motor connected to saidlatch means, valve mean connecting said differential fluid pressureoperated motor to a source of fluid at a first pressure and to a sourceof fluid at a second pressure, and valve actuator means operativelyconnected to said valve means to selectively control said valve means.2. A closure latch according to claim 1 wherein said valve meansincludes first valve means connecting said differential fluid pressureoperated motor to said source of fluid at a first pressure, and secondvalve means connecting said differential fluid pressure operated motorto said source of fluid at a second pressure, and wherein said valveactuator means is operatively connected to said second valve means forselectively operating said second valve means.
 3. A closure latch forlatching a closure member to a support member, the closure member beingswingably mounted for movement between open and closed positionsrelative to the support member, the closure latch including strikermeans secured to one of said member, latch means mounted on said othermember for pivotal movement about an axis from an unlatched position tobe a latched position, said latch means including flange means having aleasing edge portion and a trailing edge portion, relative to movementfrom said unlatched position to said latched position, with said leadingedge portion spaced a greater distance from said axis than said trailingedge portion, a stop means adjacent said trailing edge portionpositioned to be in interference relation to said striker means, and alatching pin, said flange means being operable to engage and move saidstriker means relative to said other member when said latch means isrotated from said unlatched position to said latched position, latchhook means swingably positioned adjacent said latch means to normallyengage said stop means to hold said latch means in said unlatchedposition and to be engaged by said striker means for movement to releasesaid latch means and to engage said latching pin to pivot said latchmeans from said unlatched position toward saiD latched position, powermeans operatively connected to said latch means for rotating said latchmeans from said unlatched position to said latched position, and back tosaid unlatched position and, control means connnected to said powermeans to operate said power means to selectively move said latch meansbetween said unlatched position and said latched position and to permitmovement of said latch means by said latch hook means.
 4. A closurelatch according to claim 3 wherein said power means includes adifferential fluid pressure operated motor connectable to a source offluid at a first pressure and to a source of fluid at a second pressure,said differential fluid pressure operated motor being connected to saidlatch means to move said latch means to said latched position, and biasmeans connected to said latch means to normally bias said latch mean tosaid unlatched position.
 5. A closure latch according to claim 4 whereinsaid control means includes a one-way valve means connecting saiddifferential fluid pressure operated motor to said source of fluid at afirst pressure, valve means connecting said differential fluid pressureoperated motor to said source of fluid at a second pressure, and keycylinder lock means operatively connected to said valve means toselectively actuate said valve means.
 6. A closure latch according toclaim 4 wherein said control means includes a one-way valve meansconnecting said differential fluid pressure operated motor to saidsource of fluid at a first pressure, valve means connecting saiddifferential fluid pressure operated motor to said source to fluid at asecond pressure, and electrically operated means operatively connectedto said valve means to selectively actuate said valve means.